Sigma 77mm WR (Water Repellent) Circular Polarizer Filter

Sigma 77mm WR (Water Repellent) Circular Polarizer Filter

Sigma 77mm WR (Water Repellent) Circular Polarizer Filter

B&H # SICPWR77 MFR # AFG9C0
In Stock
Order in the next 0:00:00 to ship today

Product Highlights

  • 1.25 to 1.4x Filter Factor
  • +0.3 to 0.5 Stops
  • Helps to Eliminate Reflections and Glare
  • Reduces Haze in Landscapes
  • Greater Color and Tonal Saturation
  • Black-Rimmed Optical Glass, Multi-Coated
  • Water, Oil, Static, Scratch Resistant
  • Slim Aluminum-Alloy Filter Ring
  • 77mm Front Filter Threads
  • Knurled Front Edge, Plastic Case
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  • 1Description

The Sigma 77mm WR (Water Repellent) Circular Polarizer Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.

A circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

This filter is multi-coated to eliminate internal ghosting and reflections. An anti-static coating serves to limit the accumulation of static electricity, making dust particles easier to remove or preventing them from adhering to the filter. Additionally, a water-repellent coating results in an improved beading effect when in contact with water, as well as oil, for greater cleaning efficiency while enhancing scratch resistance.
Sigma WR Circular Polarizer filters are constructed from optical glass with a black rim. Set within an aluminum-alloy filter ring that can be rotated in order to adjust the intensity of the polarization effect, the glass provides increased clarity as well as color fidelity while the black rim further ensures that reflections do not occur along the filter's edge.

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.
Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.
Clears up haze in distant landscapes and provides more saturated, vivid colors.
Strongest effect when used at a 90° angle from the sun.
Circular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features.
Multi-coated to help eliminate internal ghosting and reflections.
Anti-static coating serves to limit the accumulation of static electricity, making dust particles easier to remove or preventing them from adhering to the filter.
Water repellent coating results in an improved beading effect when in contact with water, as well as oil, for greater cleaning efficiency while enhancing scratch resistance.
1.25 to 1.4x filter factor reduces exposure by 0.3 to 0.5 stops.
Constructed from clear, optical glass with a black rim which further ensures that reflections do not occur along the filter's edge.
Slim, aluminum-alloy filter ring helps to prevent vignetting and is durable while remaining lightweight.
Filter ring can be rotated to adjust the intensity of the polarization effect.
Knurled front edges provide a more textured grip when mounting or removing it from a lens.
77mm front filter threads allow for use with other filters.
Plastic filter case for storage and transport.
UPC: 085126930837
In the Box
Sigma 77mm WR (Water Repellent) Circular Polarizer Filter
  • Filter Case
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Filter Type Circular Polarizer
    Filter Factor 1.25 - 1.4 (0.3 - 0.5 Stop)
    Shape Circle
    Circular Size 77 mm
    Rotating Yes
    Front Accessory Thread / Bayonet 77 mm
    Physical Feature Slim
    Filter Material Glass
    Coatings None
    Packaging Info
    Package Weight 0.25 lb
    Box Dimensions (LxWxH) 4.724 x 4.095 x 0.709"
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